William l



(No Model.)

W. L. VOELKER.

M-ANUPAGTURE OF INGA NDE SCENT LAMPS.

Mneases v flux 24W.

Patented June 17, 1890.

' [EVE BT01 UNITED STATES ATENT FFICE.

WILLIAM L. VOELKER, OF MORTON, PENNSYLVANIA, ASSIGNOR TO JOHN H. IRWIN,TRUSTEE, OF SAME PLACE.

MANUFACTURE OF INCANDESCENT LAMPS.

SPECIFICATION forming part of Letters Patent No. 430,156, dated June 17,1890. Application filed March 9,1882. Serial No. 54,761. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM L. VoELKER, of Morton, county of Delaware,and State of Pennsylvania, have invented certain new andusefullmprovements inIncandescentElectric Lamps, (Case 10,) of which thefollowing is a a full, clear, and exact description, referencebeinghadto the accompanying drawings, and to the letters of referencemarked thereon.

My invention relates especially to incandescent electric lamps known asvacuum lamps; and it consists, essentially, in so constructing the glassglobe or bulb and affixing the neck thereto that the parts may be easilyI 5 and readily united when inclosing the incandescing filament and itssupports, and has for its object the production of a device wherein theparts are easily assembled, and in which the proper position of thesupport and incan- 2o descing filament of carbon will bemaintained, andif the same become displaced, by simply heating the globe at its baseand bending in the requisite direction, the interior parts of the lampmaybe easily moved to place; and my invention involves certain novel anduseful combinations or arrangements of parts and peculiarities ofconstruction, all of which will be hereinafter first fully described,and then pointed out in the claim.

In the drawings, Figure 1 is an elevation of the interior parts of thelamp. Fig. 2 is a like view of the interior'parts of the lamp as fixedin a tube preparatory to sealing to the globe or bulb. Fig. 3illustrates the method of connecting the parts, and Fig. 4: shows acompleted lamp.

Like letters of reference, Wherever they occur, indicate correspondingparts in all the figures.

A is the incandescing filament of carbon, soldered or otherwiseconnected to metallic conductors A, passing to the platinum conductors Asealed in the base of the lamp at I.

Bis a support, of glass or other suitable material, through whichconductors A extend. The upper extremity of support B is made solid, asindicated at B.

O is a rod of suitable material attached to conductors A for the purposeof manipulating the parts without danger of breaking them.

IVhen the interior parts of the lamp are thus assembled, as shown inFig. 1, they are passed into a glass tubeD, having an enlargement D atits upper extremity, as shown in Fig. 2, and the carbon is passed upinto globe G, as indicated in Fig. 3, the globe being sealed toenlargement D at H. Tube D is then filed oif at I, and the glasssoftened and compressed around conductors A firmly securing the interiorparts of the lamp in place. The globe is next exhausted and sealed at L,as fully set forth and described in Letters Patent No. 255,219, grantedto me for improvements in incandescent electric lamps, dated March 21,1882. f

Having now fully described my invention, What I claim as new therein,and desire to secure by Letters Patent, isv The method of manufacture ofan incandescent electric lamp, which consists in sealing the electricconductors into a glass support, then seating the glass-support into alower section of the globe, then sealing said lower section to the uppersection of the globe, substantially as described. I

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of two witnesses.

WILLIAM L. VOELKER.

IVitnesses:

ARTHUR A. BENKERT, CHARLES R. SEARLE.

